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CVE-2009-4242

26
FAUCET Score

CVE-2009-4242 describes a heap-based buffer overflow in the CGIFCodec::GetPacketBuffer function within RealNetworks RealPlayer (versions 10, 10.5, 11, Enterprise, Mac, and Linux) and Helix Player 10.x. This critical vulnerability, with a CVSS score of 9.3, allows remote attackers to execute arbitrary code by crafting a malicious GIF file that triggers improper memory allocation. While highly severe with complete confidentiality, integrity, and availability impacts, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
10.0CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:10.0:*:*:*:*:*:*:*
10.5CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:10.5:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
11.0.1CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:11.0.1:*:*:*:*:*:*:*
11.0.2CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:11.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
8.45%
Probability of exploitation in next 30 days
EPSS Percentile
94.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0845 is in the 74th percentile among its peer group of 8,920 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: HelixPlayer-1:1.0.6-1.el4_8.1
View patch

Vendor Advisories (1)

redhatCVE-2009-4242Critical

RealPlayer: GIF file heap overflow

Sep 10, 2008

References

lists.helixcommunity.org / pipermail/datatype-cvs/2008-September/008633.html
osvdb.org / 61966
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/38218
Vendor Advisory
secunia.com / advisories/38450
securitytracker.com / id
Patch
service.real.com / realplayer/security/01192010_player/en
PatchVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/55795
helixcommunity.org / viewcvs/datatype/image/gif/common/gifcodec.cpp
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10144
redhat.com / support/errata/RHSA-2010-0094.html
securityfocus.com / archive/1/509096/100/0/threaded
securityfocus.com / bid/37880
vupen.com / english/advisories/2010/0178
PatchVendor Advisory
zerodayinitiative.com / advisories/ZDI-10-006
Patch